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Slab Mill. Rollin Bicskei and Travis Haley. Problem Statement. Design and build a mill that will auto-matically cut junk slabs to standard firewood lengths. Background. After the client is done processing logs in to lumber there are leftover slabs unfit for standard use.
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Slab Mill Rollin Bicskei and Travis Haley
Problem Statement Design and build a mill that will auto-matically cut junk slabs to standard firewood lengths.
Background • After the client is done processing logs in to lumber there are leftover slabs unfit for standard use. • Instead of wasting the wood it can be processed in to firewood.
Specifications • PTO shaft driven, 550rpm, 34hp • Hydraulically powered drive units • 12-24” cuts off of 16’ slabs • Maximum width of slabs 20” • Manually loaded slabs • Portable, most likely on a trailer
System Diagram Wood Slabs Saw Blade Clamp 6 3&4 1 5 7 Conveyor Conveyor 2 Adjustable Stop Gap between conveyors Roger Howes
Electrical System Diagram PLC Cut Length Selection Buttons Mechanical Stop Pos. Sensors Mech. Stop Motor (Vertical Positioning) Slab Fully Advanced? Sensor Clamp Pos. Sensors Chainsaw Valve Saw Vert. Pos. Sensors Conveyor Motor Valve Chainsaw Motor (for motion) Valve Worm Gear Motor (Horizontal Positioning) Sensors (Input) Mechanisms (Output)
Mechanical Stop State Diagram stop==up Raise stop Stop- right State raise stop move right Pause Stop==right lengthsel.!= dist lower stop move left lengthsel.==16” lengthsel.==24” 16” 24” lengthsel.==20” dist==24” 20” Lower Stop dist==20” Pause dist==16” stop==down lengthsel.==dist To conveyor S.R.
Conveyor State Diagram From mech. Stop routine State pause stop==down Conveyor Status Conv-eyor on To clamp routine stop sensor == 1 conveyor != on Conv-eyor off
Clamp State Diagram From conveyor routine State Pause conveyor==off raise clamp lower clamp Lower clamp To stop routine clamp==up clamp==down Raise clamp To saw routine From saw routine
Saw System Diagram State from clamp routine Pause raise saw lower saw clamp==down Cut-ting to clamp routine saw==through saw==up Raise Saw